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發(fa)布時(shi)間:2021-06-01 15:18:27 人(ren)氣:182667 來(lai)源:川(chuan)工(gong)密封(feng)
和田機械密封包括壓力控制、溫度控制、流體替換(堵塞)和雜質去除系統。在和田機械密封系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)中,上述系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)并不(bu)同時包括在內。密(mi)(mi)(mi)(mi)封系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)的選擇(ze)主要取(qu)決于(yu)主密(mi)(mi)(mi)(mi)封件的應用(yong)范圍(wei)。例如(ru)(ru),如(ru)(ru)果主密(mi)(mi)(mi)(mi)封用(yong)于(yu)高溫(wen)液(ye)體(ti)(ti),密(mi)(mi)(mi)(mi)封系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確(que)保降(jiang)低(di)主密(mi)(mi)(mi)(mi)封的環境溫(wen)度,即采(cai)用(yong)溫(wen)度控制(zhi)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。如(ru)(ru)果主密(mi)(mi)(mi)(mi)封用(yong)于(yu)固體(ti)(ti)雜(za)質(zhi)含量(liang)高的工作(zuo)介(jie)質(zhi),密(mi)(mi)(mi)(mi)封系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確(que)保在主密(mi)(mi)(mi)(mi)封前降(jiang)低(di)固體(ti)(ti)雜(za)質(zhi)含量(liang),即采(cai)用(yong)除雜(za)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。在腐蝕(shi)性介(jie)質(zhi)中,密(mi)(mi)(mi)(mi)封系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)必須(xu)確(que)保主密(mi)(mi)(mi)(mi)封降(jiang)低(di)腐蝕(shi)速率(lv)或消除腐蝕(shi),即使用(yong)流體(ti)(ti)而不(bu)是堵塞流體(ti)(ti)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong);在高壓(ya)(ya)密(mi)(mi)(mi)(mi)封裝(zhuang)置中,輔助(zhu)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確(que)保多級降(jiang)壓(ya)(ya)和其他措施,即壓(ya)(ya)力控制(zhi)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。
和田機械密封的三個主要功(gong)能(neng)如下:
1、沖洗功能,沖洗是和田機械密封基本的功能,它直接將液體注入單面密封或雙面密封的高壓側。一般的和田機械密封應該沖(chong)洗,特別是(shi)對于(yu)輕烴泵,沖(chong)洗時達到隔離介質、冷卻(que)和(he)改善潤滑(hua)的(de)目(mu)的(de)。隔離介質的(de)目(mu)的(de)可以通過將(jiang)與介質相容的(de)液(ye)體引入密(mi)封腔進行(xing)外部循環沖(chong)洗來(lai)實現。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對和田機械密封造成的(de)危害非常嚴(yan)重,可(ke)能導(dao)致密(mi)(mi)(mi)(mi)封端面的(de)磨(mo)損(sun),也可(ke)能堵塞寒冷密(mi)(mi)(mi)(mi)封系統的(de)管線(xian)。密(mi)(mi)(mi)(mi)封性系統軟件具有去(qu)除(chu)殘(can)(can)渣(zha)、保(bao)持液(ye)(ye)體(ti)清潔的(de)作用。當(dang)殘(can)(can)渣(zha)的(de)相(xiang)(xiang)對(dui)密(mi)(mi)(mi)(mi)度(du)小(xiao)于液(ye)(ye)體(ti)媒質相(xiang)(xiang)對(dui)密(mi)(mi)(mi)(mi)度(du)時,能用過(guo)(guo)(guo)濾裝(zhuang)置去(qu)除(chu)殘(can)(can)渣(zha);而當(dang)殘(can)(can)渣(zha)的(de)相(xiang)(xiang)對(dui)密(mi)(mi)(mi)(mi)度(du)超過(guo)(guo)(guo)液(ye)(ye)體(ti)媒質相(xiang)(xiang)對(dui)密(mi)(mi)(mi)(mi)度(du)時,可(ke)選用旋液(ye)(ye)分離設備或(huo)網式(shi)過(guo)(guo)(guo)濾器去(qu)除(chu)殘(can)(can)渣(zha)。
3、流體替代功能,含有固體顆粒的氣相介質和液相介質的直接密封難度很大,它們溫、毒、貴、易蒸發、易結晶。借助和田機械密封可以用雙端和田機械密封代替(ti)密封(feng)介(jie)質,將難以直接密封(feng)的介(jie)質轉化為密封(feng)潤滑性能好、清潔的密封(feng)液體介(jie)質。